package com.phonemap;

import java.io.IOException;
import java.io.PrintWriter;
import java.util.logging.Level;
import java.util.logging.Logger;

import javax.servlet.ServletException;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

import com.google.appengine.api.datastore.Entity;
import com.google.appengine.api.datastore.Key;
import com.google.appengine.api.datastore.KeyFactory;
import com.phonemap.common.Util;
import com.phonemap.models.Relationship;

@SuppressWarnings("serial")
public class RelationshipServlet extends BaseServlet {
	private static final Logger logger = Logger.getLogger(RelationshipServlet.class.getCanonicalName());
	
	/**
	 * Get the requested position entities in JSON format
	 */
	protected void doGet(HttpServletRequest req, HttpServletResponse resp)
			throws ServletException, IOException {

		super.doGet(req, resp);
		logger.log(Level.INFO, "Obtaining Relationship listing");
		String searchFor = req.getParameter("q");
		PrintWriter out = resp.getWriter();
		Iterable<Entity> entities = null;
		if (searchFor == null || searchFor.equals("")) {
			entities = Relationship.getAllRelationships();
			out.println(Util.writeJSON(entities));
		} else {
			entities = Relationship.getRelationship(searchFor);
			out.println(Util.writeJSON(entities));
		}
		return;
	}

	/**
	 * Insert the new position
	 */
	protected void doPut(HttpServletRequest req, HttpServletResponse resp)
			throws ServletException, IOException {
		logger.log(Level.INFO, "Creating Relationship");
		String relationshipName = req.getParameter("relationshipName");
		Relationship.createOrUpdateRelationship(relationshipName);
	}

	/**
	 * Delete the position
	 */
	protected void doDelete(HttpServletRequest req, HttpServletResponse resp)
			throws ServletException, IOException {

		String relationshipId = req.getParameter("id");
		logger.log(Level.INFO, "Deleting Relationship {0}", relationshipId);
		Key key = KeyFactory.createKey("Relationship", relationshipId);
		try {
			// CASCADE_ON_DELETE
			Util.deleteFromCache(key);
			Util.deleteEntity(key);
		} catch (Exception e) {
			String msg = Util.getErrorResponse(e);
			resp.getWriter().print(msg);
		}
	}

	/**
	 * Redirect the call to doDelete or doPut method
	 */
	protected void doPost(HttpServletRequest req, HttpServletResponse resp)
			throws ServletException, IOException {
		String action = req.getParameter("action");
		if (action.equalsIgnoreCase("delete")) {
			doDelete(req, resp);
			return;
		} else if (action.equalsIgnoreCase("put")) {
			doPut(req, resp);
			return;
		}
	}

}
